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- Title
Preparation of long-term hydrophilic separator for lithium-ion battery by continuous atmospheric pressure plasma.
- Authors
LI Yan; WANG Chaoliang; QIN Sicheng; ZHOU Guishu; ZHANG Jing
- Abstract
Si-containing hybrid nanoparticle films were deposited on polyethylene membranes based on atmospheric pressure continuous plasma-enhanced chemical vapor deposition. The surface morphology, chemical structure and hydrophilic etc., properties of the separator were characterized by scanning electron microscope, infrared spectrometer, X-ray photoelectron spectrometer and optical contact angle measuring instrument etc. Electrochemical impedance tests were performed on the assembled battery using an electrochemical workstation. The results show that the surface of the separator is tightly adhered with hybrid nanoparticles, whose composition is SiO3.5C1.1Hx. The water contact angle of the coated separator decreases from 121° to about 22°, and the water contact angle remains unchanged for 30 days. After heat treatment at 120 ° for 1 h, the air permeability remains basically unchanged, which meets the assembly process requirements for lithium-ion battery separator. The charge transfer impedance value of the original separator-assembled battery is 81.69 Ω, while the impedance value of the coated separator-assembled battery is reduced to 64.51 Ω. This means that the charge conductivity of the coated separator-assembled battery is improved. The atmospheric pressure continuous plasma-enhanced chemical vapor deposition is an efficient method for preparing long term hydrophilic polymer separator, which has great application prospects for high-performance lithium-ion batteries
- Subjects
LITHIUM-ion batteries; PLASMA-enhanced chemical vapor deposition; ATMOSPHERIC pressure; CONTACT angle; IR spectrometers; SCANNING electron microscopes
- Publication
Journal of Donghua University (Natural Science Edition), 2022, Vol 48, Issue 6, p29
- ISSN
1671-0444
- Publication type
Article
- DOI
10.19886/j.cnki.dhdz.2021.0714